The structure of disks around Herbig Ae/Be stars as traced by CO ro-vibrational emission G. van der Plas, M. E. van den Ancker, L. B. F. M. Waters and C. Dominik A&A, 574 (2015) A75 Published online: 28 January 2015 DOI: 10.1051/0004-6361/201425052